Hosta

In enzymology, an AMP nucleosidase (EC 3.2.2.4) is an enzyme that catalyzes the chemical reaction

AMP + H₂O D-ribose 5-phosphate + adenine

Thus, the two substrates of this enzyme are AMP and H₂O, whereas its two products are D-ribose 5-phosphate and adenine.

This enzyme belongs to the family of hydrolases, specifically those glycosylases that hydrolyse N-glycosyl compounds. The systematic name of this enzyme class is AMP phosphoribohydrolase. Other names in common use include adenylate nucleosidase, and adenosine monophosphate nucleosidase. This enzyme participates in purine metabolism.

Structural studies

As of late 2007, 5 structures have been solved for this class of enzymes, with PDB accession codes 1T8R, 1T8S, 1T8W, 1T8Y, and 2GUW.

References

• Hurwitz J, Heppel LA, Horecker BL (1957). "The enzymatic cleavage of adenylic acid to adenine and ribose 5-phosphate" (PDF). J. Biol. Chem. 226 (1): 525–540. PMID 13428783.